anderton



June 12, 1928.

F. S. ANDERTON STEAM SUPERHEATER Filed June l, 1926 3 Sheets-Sheet Flai.

o o :TY-"

INVENTOR F. S. ANDERTON STEAM SUPERHEATER June 12, 1928.

5 Sheets-Sheetl 2 Filed June l, 1926 INVENTOB.: 3&5.

June l2, 1928.

F. S. ANDERTON STEAM SUPERHEATER Filed June 1, 1926 3 Sheets-Sheet INVENTR.

Patented June l2, 1928.

UNITED rSTATES PATENT OFFICE.

FRANCIS SKINNER ANDERTON. OF BLACKBURN, ENGLAND.

STEAM SUPERHEATER.

Application filed .Tune 1, 1926, Serial No. 112,92, and in Great Britain September 9, 1925.

This invention relates to superheaters tor steam generators wherein U shaped or other tubes are secured at their ends to headers. 1n this type of superheater it is customary to bend the ends of the tubes outwardly in the form ot' crooks and to expand the ends otl the tubes in groups ot' two or more into plates which are secured to the tops ot' the headers by studs and nuts. Vith this construction a tube cannot be expanded when in position owing to its ends being; crooked or bent and in the event ot any one tube in a group becoming damaged it is necessary to remove all the tubes in that group 'from the header in order to repair or replace the damaged tube.

According to this invention single U shaped or other tubes are attached to headers in such manner that their ends can be expanded whilst in position and any individual tube can be removed and replaced without disturbing any ot the others and without displacing the bricliwork, or setting. Any tube which is not required can be withdrawn and replaced by a stopper.

For this purpose the end of each tube is expanded into a tubular casting formed with a closable aperture opposite to the tube and with a spigot adapted to enter au aperture in the header and make a tight joint therewith.

In the accompanying drawings Fig. 1 is a plan ot'Y part ot a steam superheater constructed according to this invention.

Fig. Fig. 1.

Fig. 3 is a section of one ot the tubular castings drawn to a larger scale. and

Fig. 4 is a plan oit the casting shown in Fig. 3.

A indicates the U shaped tubes. B the headers7 and C the tubular castings.

In carrying out the invention each oi the tubular castings C may be constructed trom steel and may terminate at one end in a T piece c and at the other end iu an elbow c1. Thel end of the tube A is expanded into one branch oi" the T piece by au expanding tool which is inserted through the. other branch. This branch is normally closed by a flanged plug c2 which is tapered to tit into a tapered hole in the branch and is secured therein by bolts and nuts c3, the bolts passing through lugs 04 on the branch and flanged plug. lt' desired a jointing ring may be interposed bctween the flange on the plug and the mouth 2 is a section talien on line 2-2 of ot the branch. The branch pipe of the elbow is tapered at c5 to enter a tapered hole in the header B. .lt` may also be termed with a flange such as o and a jointing ring may bo inserted between such flange and the header. The holesl in the header which receive the aloresaid tapered portions are staggered as shown in Fig. .l so that when the tubes A are placed in position they occupy a staggered relationship to one another between the two headers. The castings C may be. secured to the headers by plates l) which may bc held in position by collarcd studs d screwed atI intervals into the headers. These plates occupy a position above the tops ot the castings C and each plate is 'formed with a number of tapped holes (/1 which occupy a position centrally above the branch pipes ot' the elbows. Screwed into each of these holes is a set screw d for exerting pressure upon a thickencd portion c7 of the 'asting C and -ausing the tapered end ot thc branch pipe to be forced tightly into the tapered aperture in the header. With this construction the end ot' any tube can be expanded as and when required whilst it is in position by removing the flanged plugo2 and inserting and actuating an expanding tool. Any tube that is not required can be taken out. a tapered flanged stopper or plug is then inserted into the tapered aperture in the header and secured by its respective set screw in the plate. The plates D are advantageously made in short `lengths which contact With one an- ()l'llQl' finti. 011C' 0l' IIIOI'C lClllOYtlble ('OVGI plates E span the distance between the plates D. .Round or other suitably shaped headers may be substituted for the ones shown.

lVhat 1 claim as my invention and desire to secure by Letters Patent in the United States is l. ln a steam superheater, a header having` a plurality of apertures, a plurality of tubular castings each having a spigot litted in one ot said apertures, a phuality of tubes having ends secured in said castings. the castings having apertures opposite to the ends ot the tubes. removable closures for the .last named apertures. a plate connected with tho header and extending across said castings opposite to the header. and set screws extending through said plate and engaging said castings to 'torce the spigots into the tirst named apertures.

2. In a steam superheater, spaced headers each having a plurality of apertures, a pluralty of tubes intermediate said headers, a separate tubular casting for each end of each tube,.the ends of the tubes being` secured in said eastilxgs and the castings havingapertures opposite to the ends of the tubes, removable closures for the last named ape1- tunes, each Casting having a spigot fitted in one aperture of one headel", plates connected to the headers and extending across said castings opposite to the headers, set screws extending through said plates and engagging said castings to force said spigots into the first named apertures, and a cover ext-ending,T across the space between said plates.

In Witness whereof l have signed this speci'eation.

FRANCIS SKINNER NDERTON 

